<?php
session_start();
if($_GET['m'] != null and $_GET['m'] != ""){
	if(strtolower($_GET['m']) == strtolower($_SESSION['code'])){
		echo "验证码正确！";
	}else{
		echo "验证码错误！";
	}
}else{
	echo "请输入验证码！";
}

 ?>